Syntax

Get/Set Value in Runtime

Property Value

A positive number that means the identifier of the upload stream the Progress event is raised for.

This property is meaningless when used outside of the Progress event handler.
This value is guarantied to be in range [0, MaxConnectionCount - 1].

Remarks

This property is useful when files are uploaded with several concurrent connections. If you write the Progress
event handler which should display different information for different upload stream, use this property to detect which connection the event is
raised for.